6494438544 has 80 divisors (see below), whose sum is σ = 18335522880. Its totient is φ = 1964462080.

The previous prime is 6494438543. The next prime is 6494438551. The reversal of 6494438544 is 4458344946.

It is not an unprimeable number, because it can be changed into a prime (6494438543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289624 + ... + 311240.

It is an arithmetic number, because the mean of its divisors is an integer number (229194036).

Almost surely, 2^6494438544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6494438544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9167761440).

6494438544 is an abundant number, since it is smaller than the sum of its proper divisors (11841084336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6494438544 is a wasteful number, since it uses less digits than its factorization.

6494438544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22208 (or 22202 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 51.

The square root of 6494438544 is about 80588.0794162511. The cubic root of 6494438544 is about 1865.7231650835.

The spelling of 6494438544 in words is "six billion, four hundred ninety-four million, four hundred thirty-eight thousand, five hundred forty-four".